Wicked Desire by Jordan Silver

It’s an old tradition, taking your brother’s widow if he dies childless. She had no idea when she married into the family; not until the day I showed up on her doorstep to collect.

My brother has always been a monster, someone I stayed away from when I was old enough to know better. I didn’t expect to fall for his girl and had no intentions of crossing that line. But now the bastard’s dead and the old archaic tradition is just the excuse I need to get her into my bed.